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Equilibrium Alpha in Asset Pricing in an Ambiguity-averse Economy

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  • Katsutoshi Wakai

Abstract

We derive an equilibrium asset pricing relation analogous to the cap-ital asset pricing model (CAPM) for investors whose preferences follow the robust mean-variance preferences introduced by Maccheroni, Mari-nacci, and Ru￠ no (2013). Our model de?nes a precise relation between the value of alpha from the market regression and ambiguity: alpha is positive if the asset has greater exposure to market ambiguity than market risk, and vice versa.

Suggested Citation

  • Katsutoshi Wakai, 2015. "Equilibrium Alpha in Asset Pricing in an Ambiguity-averse Economy," Discussion papers e-15-010, Graduate School of Economics , Kyoto University.
    • Handle: RePEc:kue:epaper:e-15-010
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    References listed on IDEAS

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    1. Gilboa, Itzhak & Schmeidler, David, 1989. "Maxmin expected utility with non-unique prior," Journal of Mathematical Economics, Elsevier, vol. 18(2), pages 141-153, April.
    2. Zengjing Chen & Larry Epstein, 2002. "Ambiguity, Risk, and Asset Returns in Continuous Time," Econometrica, Econometric Society, vol. 70(4), pages 1403-1443, July.
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    Cited by:

    1. Chiaki Hara & Toshiki Honda, 2014. "Asset Demand and Ambiguity Aversion," KIER Working Papers 911, Kyoto University, Institute of Economic Research.
    2. Katsutoshi Wakai, 2018. "A Factor Pricing Model under Ambiguity," Discussion papers e-17-012, Graduate School of Economics , Kyoto University.

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    More about this item

    Keywords

    Ambiguity aversion; asset pricing; capital asset pricing model (CAPM); robust mean-variance preferences;
    All these keywords.

    JEL classification:

    • D81 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Criteria for Decision-Making under Risk and Uncertainty
    • G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions
    • G12 - Financial Economics - - General Financial Markets - - - Asset Pricing; Trading Volume; Bond Interest Rates

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